Help provision in a data processing system

ABSTRACT

Help is provided to the user of a data processing system having a work station, including a display, and input means including a visible on-screen indicator and a selection means, in response to a request from the user, information on the current state of the system is used to address a store of hierarchical help text information, thereby providing contextual help text which is displayed in a separate window on the display screen alongside information related to the task in hand. A help map function is available which displays concurrently, separately from the help text, a portion of a hierarchical map of the stored help text to be replaced by new help text corresponding to the selected map entry.

TECHNICAL FIELD OF THE INVENTION

The invention relates to data processing systems and to a method of providing help to a user of such a system.

BACKGROUND OF THE INVENTION

It is common practice for programmed data processing systems to provide help to an operator or user in response to a request for help. Such help is displayed to the operator at a workstation and frequently replaces the previous display screen entirely. Help may consist of actual help information or of a menu or index of possible help from which the operator is required to select an item. Such indices can be very extensive and laborious to search in themselves.

So called contextual help is known in which the help provided is not merely general to the current screen or application but is specific to the actual position of a cursor or pointer on the screen. Three related articles describing a contextual help system by R E Berry, S E Johnson et al. are found in the IBM Technical Disclosure Bulletin (Vol. 7, No. 10B, March 1985 at pages 6126, 6127 and 6128). These articles show the provision of contextual help in windows on a display screen. Two types of Help panel are possible, Active and Passive. The Active panel allows the operator to make further unspecified selections from within the panel. However, no other provision for knowing what alternative help is available is made.

Another contextual help system making use of windowing capabilities is described in European patent application 0185845 A2, entitled "Help placement on a screen for a computer user". Help messages are displayed in a window which is so positioned in areas of the screen as to minimise the overlapping or obscuring of the screen content.

Also known in the provision of help to a computer user is the concept of multi-level help in which, if the initially displayed information (first level help) is inadequate, the user may request further more detailed information (second level help). Examples of systems employing multiple levels of help can be found in an article by P D Koeller et al in the IBM Technical Disclosure Bulletin entitled "Improved method for Help Lookups" (Vol. 29, No. 1. June 1986, P 291) and in European published patent application 0190419 A2 entitled "Method for providing an on-line help facility for interactive information handling systems".

DISCLOSURE OF THE INVENTION

The above mentioned prior art thus fails to provide easy location of alternative or related help at the same level as the contextual help initially provided.

Accordingly, the present invention provides a data processing system having a work station including a display for displaying on a screen panels of information relating to one or more tasks, the panels being viewable through windows under the control of a display manager, and operator input means by which an operator can communicate with the system interactively, the input means including indicator means for identifying items on the screen by means of a visible on-screen indicator, selection means for communicating a selection to the system on the basis of displayed information and help request means for requesting help information from the system; the system further including an addressable store of hierarchical help text information, contextual help means responsive to an appropriate request for help and to the current state of the system when help was requested to access the help text store to obtain appropriate help text and to cause the display manager to display said help text through a help text window on said screen, concurrently with the information related to the task or tasks in hand which was being displayed when help was requested, help map display means responsive to selection by said selection means to cause the display manager to display in a separate window, concurrently with said help text window, at least a portion of a hierarchical map of the stored help text, each entry of which corresponds to a unit of stored help text, and means responsive to selection of a map entry by said selection means to cause help text corresponding to the selected map entry to replace that in the help text window.

The invention also provides a method of providing help to a user of a data processing system having a work station including a display and operator input means by which an operator can communicate with the system interactively, the input means including indicator means for identifying items on the screen by means of a visible on-screen indicator, selection means for communicating a selection to the system on the basis of displayed information and help request means for requesting help information from the system; the system further including an addressable store of hierarchial help text information; the method comprising the steps of accessing the help text store in response to a request for help and to the current state of the system to obtain appropriate help text, displaying said help text concurrently with the information related to the task or tasks in hand, responding to selection of help map function by the user to display, separately from the help text but concurrently therewith, at least a portion of a hierachical map of the stored help text each entry of which corresponds to a unit of stored help text and responding to a further selection by the user of an entry on the help map to display new help text replacing that originally displayed.

By providing a help map concurrently with the help text and application, the user is enabled, without losing track of the circumstances in which he first requested help, to consider and select alternative related help text at the same level which may be more appropriate to his needs. This does not exclude the known provision of help at different levels, in addition, such as, for example, a lower tutorial level of help.

Although selection could be made purely on the basis of a typed response to messages, it is preferable that the selection means is associated with the visible indicator so that the displayed item indicated by the indicator is selectable by operation of the selection means. This could involve selection of an item indicated by a cursor by operation of an entry key as a keyboard or could be effected with a light pen. However, the preferred implementation is a so called "mouse" device in which movement of a pointer on the display is caused by movement of the mouse. Depression of a selection button on the mouse selects the item indicated by the pointer.

In order for the contextual help means to access the help text store, it is preferred that the current state of the system be defined by a plurality of system state variables which the help means uses as addressing information. It is also preferred, that the system variables are ranked in an order corresponding to different orders of help text in the help text store. Thus, a system state defined by system variables including low order variables would result in a correspondingly low order (i.e. more specific) help text whereas a system state defined only by high order variables would result in a correspondingly high order (i.e. more general) help text.

It should be noted, at this point, that the reference to help text of different order relates to the generality or specificity of the text and not to the provision of different help function at different levels of operation.

Although, in theory, the system variables could be used directly to address a help text store, it is preferred that the help text store is addressed by a key which is obtained from a key table to which the system variables are applied. The key can thus be an address actually used by the system memory whereas the system variables are essentially user or system function oriented. It will be realised that each system state, as defined by the system variables, does not necessarily correspond to a unique unit of help text. Some system states may share common help text so that addressing the key table will produce the same key.

Another preferred feature of the invention, related to the provision of contextual help, is that the low order system variables relate to the position of the indicator on the screen. Thus the corresponding low order help text can relate directly to the item or area identified by the indicator.

A convenient preferred version of this is that at least three orders of system variable are used corresponding to the application being executed, the current panel on the display screen which is owned by the application and any predefined box located within the panel. There are three corresponding orders of help text in the help store from high to low respectively.

It is also possible in some systems to have a fourth higher order of help corresponding to a system facility which owns the application.

Turning now to the help map itself, although it is possible for a static map to be stored by the system, there are advantages in generating the map dynamically from the help text store. One of these advantages is that users can add to or modify the stored help text which will immediately be reflected in the map next time it is created.

Clearly either a static or dynamic map may be too large to be viewed through the available window. It has been found preferable, where possible within the hierarchy, to select for display the map entries of the same order as the current system variables which share common higher order system variables and also to display the higher order entry represented by the common higher order variables.

If by any chance, the map entry corresponding the current system variables is not visible immediately within the help map window, the window can be scrolled or panned conventionally to reveal the remaining entries sharing the same higher order entry until the required entry is found.

Although scrolling and panning could be employed to reveal other areas of the map, it is preferable to provide a more systematic selectively operable branching mechanism for the user to move around the map. This operates so that branching may be selected on given map entries to cause display of a new help map. Where the given entry was originally one of the lower order entries, it becomes the higher order entry on the new map. Where the given entry was originally the higher order entry, it becomes one of the lower order entries on the new map.

To assist branching, the map entries preferably include icons, for example arrows, to indicate the permitted direction of branching. Where no further branching is possible from an entry, no icon is provided. The branching operation can be selected by any of the various selection techniques discussed above, the easiest being use of mouse and pointer.

Although the map offers a convenient method of navigation around the help text, it need not be the only method by which alternative text may be obtained. In a preferred version of the system, a unit of help text can include selectable branch words within the body of the text which are associated with related units of help text. Branching to the related units of text occurs in response to selection of a selectable word by the indicator/selection means combination. The result of the branching operation is that the display manager replaces the original text in the help text window with the related text.

As a further variant on the above, a glossary store may also be provided so that, upon selection of a word of help text from which no branch is permitted, a definition of the selected word or alphabetically nearest word in the glossary store is displayed in a separate glossary window.

The invention will now be described in more detail, by way of example only, with reference to a preferred embodiment thereof as illustrated in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of the major hardware components of a data processing system according to the invention;

FIG. 2 illustrates schematically the help available in the preferred embodiment of a data processing system according to the invention;

FIG. 3 illustrates the format of a Master window produced on the display in the preferred embodiment of a data processing system according to the invention;

FIG. 4 illustrates a display screen layout produced in the preferred embodiment at the point of selection of a View/Change application;

FIG. 5 shows a display screen resulting from the running of the View/Change application of FIG. 4;

FIGS. 6-8 shows successive display screens which are produced in the preferred embodiment as a result of employing certain of the help provision illustrated in FIG. 2;

FIG. 9 shows portions of a Help Index Table and Help Text Store employed in the preferred embodiment of the invention; and

FIG. 10 illustrates schematically the creation of Help Map in the preferred embodiment of the invention.

BEST MODE FOR CARRYING OUT THE INVENTION

A data processing system according to the invention comprises both hardware and software. The hardware of the system is illustrated in FIG. 1 and is conventional.

A microprocessor 10 communicates with a fixed memory 11 and with peripheral devices. These include fixed disk storage 12 and floppy disk storage 13 by way of which programs can be loaded to cause the system to execute data processing tasks. The results of these data processing tasks are displayed to an operator or user, by way of a graphics adapter 14, on a colour display 15.

Input to the system by the operator may be from keyboard 16 which has a normal range of keys, including an entry key 17 which may be used to indicate selection, and a help key 18 (labelled F1) for requesting help from the system. As an alternative to requesting selection and help from the keyboard, a mouse device 19 is also provided. Movement of the mouse causes movement of a pointer on the screen of display 15. The mouse is provided with at least two distinct buttons, one of which, 20, indicates selection of the item at which the pointer is pointing and the other of which, 21, is a request for help, whose function is exactly equivalent to operation of the F1 key on the keyboard.

The software part of the data processing system consists of normal operating software for controlling operation of the hardware and an application program which the user desires to run.

One example of suitable hardware and operating system would be an IBM PS/2 computer (models 50, 60 or 80) with an IBM OS/2 (Release 1.0) operating system (IBM is a Registered Trademark and PS/2 and OS/2 are Trademarks of International Business Machines Corporation).

The application program which is part of the data processing system of FIGS. 1 and 2 is of the multi-tasking kind in which numerous tasks can run simultaneously. It consists of general system functions and a set of basic applications that enable general data manipulation and presentation to be performed.

The system functions include two primary components, the Display Manager and the Data Store Manager. The latter manages all data used by the system which is held in Data Stores. A Data Store is single level and contains various data values and attributes as Data Items. A data dictionary provides information about the individual Data Items which are referenced by symbolic names.

The Display Manager provides full display services in all points addressable mode. It is fully integrated with the Data Store.

The display manager allows many logical screens (panels) to be presented on the physical display 15. These panels are presented through windows which may be a different size from the related panel. The windows may be displayed with or without overlap. With the exception of data entry, any of these windows may be directly employed even if they are partly hidden by another window. Data entry may only be performed on the top most window, which is identified by the presence of a data entry cursor. The Display manager presents data from the DataStore; the application does not write data to windows. All applications present their information within these windows using panels. The panel is the application's defined display layout which will be presented somewhere on the physical display through a window.

The entire screen is available to display windows which are optimally placed by the display manager. All windows have borders and may overlay one another if necessary. The user may move a window, even partially off the screen. Error and warning messages plus help information appear through Pop-up windows.

The physical screen is referred to as the `desk top` and always contains a Master window giving access to all system function. The Master window occupies minimal screen space, containing a Prompt Area, Command Line and an Application Action Bar (AAB), consisting of a number of choices. Its format is as shown if FIG. 3.

The Application Action Bar choices may be selected using keyboard 16 or mouse 19. On selection they present Pull-down windows with the following services:

Process: Initiation of saved specifications, programs and procedures;

Facilities: Initiation of any enrolled application;

Data: Data Dictionary Management function are provided via a data window;

Actions: Enable the user to perform various actions, set profile information and enroll new facilities and applications;

Desk Top: Manipulation of objects on the desk top;

Exit: Close down the system and any active applications:

By way of example, and as illustrated in FIG. 4 the facilities service is accessed via the Facilities AAB choice on the Master Window. Facilities include, among others, General, Reporting, Statistics and Development as shown in the pull-down window 30 in FIG. 4 which appears on the desk top when selected by means of the mouse 17 and pointer.

Access to individual applications within these facilities is achieved by selection of the relevant facility. This gives a Pop-up window containing a selectable list of applications. In the example of FIG. 4 the General Facility is selected and a pop-up window 31 lists the available applications. The pointer 32 is pointed at an application called View/Change which will be used to illustrate the help facilities of the system. Noteworthy in FIGS. 3 and 4 is any area 34, in the AAB designated "F1=Help". This is an alternative way of requesting help and requires the use of the pointer to point at area 34 and the operation of the select button on mouse 19. Common Action Areas (CAA's) at the bottom of windows 30 and 31 enable the cancellation of the current panel. CAA's, in some cases, may also contain an "F1=Help" box.

As well as the Master window on the Desk Top, every application has a Main window with an Application Action Bar. An example in FIG. 5, shows a screen with the selected View-Change application in progress. In any application, Pull-down windows are presented below the AAB choice on selection. Secondary windows may be presented by the application for displaying information supplementary to that in the Main window. Pop-up windows may also be used to present very short term dialogues adjacent to a box on a Main or Secondary Window.

To assist with the description of the help function, a more precise definition of the terms "Window", "Panel" and "Box" is desirable.

Panels are virtual rectangular areas used to present information through the windows. Each panel consists of a rectangular area with a background colour, and optional foreground colour and pattern, and a set of boxes. Each panel is named.

Boxes are used to present character data or graphic objects within the panel. Each box is also rectangular and is named.

A window is a rectangular area through which panels are displayed. The window is placed suitably by the Display manager unless the application specifies that the window be placed adjacent to a box in another window. During a session, users may reposition the windows if desired.

Each window is known by name to the application and the window size limit is essentially that of the panel it is displaying. A window has an initial size given by the associated panel but this may be changed by the application or `Desk₋₋ Top` function. Windows are positioned suitably on the desk top by the system. However, the user may reposition a window. The cursor indicates the active window (for data entry purposes). Additionally, all windows have borders which clearly define the extent of the window. The top border contains a title. The border may also contain arrows that can be selected for scrolling.

Turning now to FIG. 2, a system for providing a total support environment for the user is illustrated. All the information necessary to use the system is available online, with a few exceptions. Help is available at three different levels and can be requested at any time during a session.

First level support is provided when the Help key 18 or 21 (F1) is pressed once. A message 22 is displayed within a pop-up window and relates to the area under the pointer. The help provided is associated with either the box or panel at which the pointer is directed. This first level of support provides an instant clue for the user who is momentarily puzzled, or who requires very little information to get on the right track, but will probably be of little support to users who lack an understanding of the application they are using. First level help is provided by the application concerned.

Second level support is provided by the invocation of a special Help program when the user presses the Help key (F1) twice with the pointer in the same area, or by selecting an F1=Help box in an AAB in, for example, an application window 23. Second level help takes the form of a longer piece of text displayed within a Help window 24.

The information displayed is dependent upon which application the user is in, and at what point within that application. Support is contextual. Selecting the F1=Help box displays overview information about the application or facility which owns the box.

The Help window 24 provides the additional options of selecting access to a Glossary 25 for explanations of words or phrases, access to a hierarchical map 26 of the second level help text, and access to a third level of support, the tutorial 27.

Second level support is extremely flexible. The user who understands the concepts and purpose of an application, and who invokes support for clarification of a specific point, is likely to get exactly the information he needs. The user requiring more detailed or general information than that provided can use the map browsing facilities to move up or down a hierarchical level of information. The user who is out of his depth can access the tutorial level of support to discover the concepts behind application, and get an overview of its function and the tasks it supports. Selection of third level support is by selection of a "Tutorial" box in the help window 24.

Third level support is intended for first-time users of either the system or a particular application. A tutorial is explanatory in intent. It covers principles, facilities and typical tasks. It does not cover every possible task. It may involve a two-way information flow; the user may be asked to answer question or do exercises.

The four components provided by the main Help program are Text 24, Help Map 26, Glossary 25 and Tutorial 27. The first three can be concurrently displayed on the same screen whereas a Tutorial can only be concurrent with the Glossary.

The Help Text is provided in a main window 24 with AAB which is scrollable. It is invoked through initial support selection or via the Help Map 26. The Help Text function also allows branching by selection of a selectable word to alternative Text. If there is no alternative Text, the program branches to the nearest Glossary entry.

The Help Map is controlled by a sub-program invoked through Help Map selection on the Help Text window AAB. It provides a window based graphical tree structure 28 showing related Help Text titles and selection of the related Text items 29, which appear in the window 26. The Help Map program allows scrolled movement through the tree and branching up and down the tree structure.

The Glossary is also controlled by a sub-program invoked through Glossary selection on the Help Text window or the Tutorial. It provides definitions given by selecting a keyword from the Help Text or Tutorial or by typing in the desired word. If there is no entry for the desired word, the alphabetically nearest words in the Glossary are displayed.

Tutorials are also controlled by a sub-program invoked from the Help Text window. Tutorial text is provided in a main window 27 with AAB which is scrollable. As with Help Text, Tutorials allow branching by selection to alternative Text and branching by selection to a Glossary entry. They also replay recordings for demonstrations.

The structure and operation of the Help and Help Map programs will now be explained in more detail with particular reference to the screen examples shown in FIGS. 4-8. It will be assumed that as a result of the selection of the View/Change application from the window 31 of FIG. 4, the user has retrieved the table of data of employee salary details shown in FIG. 5, which is displayed in the application window 50, beneath master window 51. It is assumed the the user wishes to change the column headed "Salary" to read "Compensation" but does not know the procedure for doing so.

Although the experienced user would point the pointer 52 at the word "Salary" and, by pressing the F1 key twice, get the required contextual help on column headings, shown in FIG. 8, the less experienced user might well press F1 help with the pointer on the window border or in a blank area. Pressing F1 once, displays a Help message window containing the message "Select a View or Data Items to display the selected data". As this clearly does not provide the right sort of help, the user presses F1 again. This causes the View/Change application to set the system variables defining the current state of the application and to call the Help program. The system variables define the Facility, Application, Panel and Box. In the example, the first three are set to "General", "View/Change" and "View/Change" and null values are entered in the box. The name of the first panel in an application is always the same as that of the application, i.e. "View/Change", though the system variable is a panel variable.

The Help program opens various panels of its own, including the main Help window corresponding to 24 (FIG. 2) and interrogates the system variables to determine the subject on which help is required. A title for the Help window is created. A Help Index table 90 is then interrogated, as illustrated in FIG. 9, to extract a key value 91 corresponding to the system variables. This key is used to interrogate a Help Text table 92 to extract corresponding Help Text 93 for display in the Help Window.

In the example, the text displayed is shown in Help window 60 in FIG. 6. This provides panel level help for the View/Change panel (which may be different from application level help). This still does not give the required information but is getting close to the subject of interest.

The user may then access the Help Map to find out what other help is available in this area. This is done by pointing the pointer at the word "Reference" in the AAB of window 60 which produces a small pull-down window 61 listing the two reference functions Help Map and Glossary. Pointing the pointer at the Help Map entry and selecting it causes the display of a Help Map similar to that shown at 70 in FIG. 7.

Selection of Help Map causes a Help Map program to generate the help map by creating current lists of all Facilities, Application, Panels and Boxes. These are arranged in a tree structure as shown schematically in FIG. 10 in which higher order (or parent) entry has associated with it a number of lower order (or child) entries. The parent entry corresponding to the current system variables is determined and placed in the Help Map panel along with all child entries which share that parent. The lowest specified (i.e. non-null) system variable is one of the child entries. Dynamic creation of the Help Map, as opposed to storing it statically, permits modifications and additions to the map to be made.

It may not always be possible to display all child entries in the Help Map window 70 and this is the case in the example chosen, the Help Map program initially displays the first five child entries in alphabetic order. Where the View/Change application entry 71 is the parent, the View/Change panel entry 72 is not one of the five initially displayed child entries. The Help Map window may however be scrolled downwardly as illustrated by arrows 73 in its border to bring the View/Change panel entry 72 into view as shown in FIG. 7.

The various entries are enclosed in boxes which include sub-boxes at their left hand margins. The presence of an arrow in the sub-box indicates that there are further portions of the help map including the particular entry. An upward arrow such as 74 indicates that a higher level of map structure is available in which the View/Change application entry is a child entry. A downward arrow such as 75 indicates a lower level of map structure is available in which the child entry, such as View/Change panel is the parent entry.

Selection of an alternative portions of the Help Map is by pointing at the branching arrow and selecting. In the present, example the pointer 76 is used to select a downward branch from the View/Change panel entry.

The Help Map program then displays the lower level Help Map portion shown in window 80 of FIG. 8. At this point the displayed help text in window is unchanged from that in window 60 in FIGS. 6 and 7.

The new help map in window 80 contains the View/Change panel entry 81 as parent, though this time with an upward branch arrow. The child entries relate to boxes within the View/Change panel and include an entry 82 entitled "Column Heading". Selection of entry 82 by pointer 83 causes the system variables to be reset to reflect those for the "Column Heading" box and the replacement of the Help Text in window 84 by new text relating to Column headings. The user now has enough information presented in the Help Text main window to enable him to make the change to the column heading"Salary" in the main application window 85.

It will be noted that the application window does not disappear when the Help Text and Help Map windows are opened, so that the user is unlikely to forget the problem which caused him to request help and can initiate the action directly.

It may also have been noted that there is an "F1=Help" area in the Help Text windows, 60 and 84, themselves. This is selectable by means of the pointer to produce help relating to the use of the Help function rather than on the subject of the text.

Help at levels above box level (i.e. panel level) may be selected by pointing and selecting blank areas and borders of the application window or the "F1=Help" area of its AAB. Help at the Application or Facility level must be selected from the appropriate display such as FIG. 3 or 4 or by branching up the map. The highest level of help is system level help obtained by branching upwards from Facility level help or by selecting contextual help on the overall application program name.

One further aspect of the help architecture of FIG. 2 is the use of branching from displayed Help Text words in the Help Text may be made selectable when it is created. Selection of such a work with the pointer causes the key to the current help text to be applied with the selected word to a Help Text Branch table. For each selectable word, the Help Text Branch table contains a Destination Key which is the key to Corresponding Help Text in the Help Text Table. The Help Text corresponding to the selected word replaces the original Help Text in the displayed window. Thus if the words "Column" or "Heading" had been predefined as selectable words in the View/Change help text of FIG. 7, selection of these words with the pointer would have produced the Column Heading help text without the need to use the Help Map.

As previously explained, if a word is not predefined as selectable, an attempt to select it results in a Glossary program being called which displays in yet another window, the selected word and its definition or the alphabetically nearest words.

Having described the principles of operation of preferred embodiment, illustrated by example, there follows a detailed description of the Help and Help Map programs. ##SPC1## 

We claim:
 1. A data processing system having a workstation, comprising:a display for displaying on a screen panels of information relating to one or more tasks, the panels being viewable through windows under the control of a display manager, and operator input means by which an operator can communicate with the system interactively, the input means including: indicator means for identifying items on the screen by means of a visible on-screen indicator. selection means for communicating a selection to the system on the basis of displayed information, and help request means for requesting help information from the system, the system further including: an addressable store of hierarchical help text information, contextual help means responsive to an appropriate request for help and to the current state of the system, as defined by a plurality of system state variables including low order and high order variables, which are applied by the contextual help means as addressing information, when help was requested to access the help text store to obtain appropriate help text and to cause the display manager to display said help text through a help text window on said screen, concurrently with the information related to the task or tasks in hand which was being displayed when help was requested, said low order system variables being related to the position of the indicators on the screen. help map display means responsive to selection by said selection means to cause the display manager to display in a separate window, concurrently with said help text window and said information related to the task or tasks in hand, at least a portion of a hierarchical map of the stored help text, each entry of which corresponds to a unit of stored help text, and means responsive to selection of a map entry by said selection means to cause help text corresponding to the selected map entry to replace that in the help text window. wherein one said system variable corresponds to the panel in which the indicator is located, a lower order system variable corresponds to the location of the indicator within a predefined box in the panel and a higher order system variable corresponds to the application which owns the panel, there being three corresponding orders of help text for boxes, panels and applications, the panel order of help being selectable from a predetermined help box in the panel or from a non-boxed area of the panel and the application order of help being selectable from the help map or from a system state in which the lower order system variables are set to null value.
 2. A system as claimed in claim 1 in which the help text store also contains help text for a facility order of help, above the application order of help, and corresponding to a facility order system variable.
 3. A data processing system having a workstation, comprising:a display for displaying on a screen panels of information relating to one or more tasks, the panels being viewable through windows under the control of a display manager, and operator input means by which an operator can communicate with the system interactively, the input means including: indicator means for identifying items on the screen by means of a visible on-screen indicator, selection means for communicating a selection to the system on the basis of displayed information, and help request means for requesting help information from the system, the system further including: an addressable store of hierarchical help text information, contextual help means responsive to an appropriate request for help and to the current state of the system, as defined by a plurality of system state variables including low order and high order variables which the contextual help means applies as addressing information, when help was requested to access the help text store to obtain appropriate help text and to cause the display manager to display said help text through a help text window on said screen, concurrently with the information related to the task or tasks in hand which was being displayed when help was requested. help map display means responsive to selection by said selection means to cause the display manager to display in a separate window, concurrently with said help text window and said information related to the task or the tasks in hand, at least a portion of a hierarchical map of the stored help text, each entry of which corresponds to a unit of stored help text, wherein if the help map is too large to be viewed through a help map window, the help map display means being responsive to the current system variables, where these do not define the highest order of system state, to select for display map entries of the same order as the current system variables which share common higher order system variables and also to select for display the higher order entry represented by said common higher order variables. means responsive to selection of a map entry by said selection means to cause help text corresponding to the selected map entry to replace that in the help text window.
 4. A system according to claim 3 in which the help map display means include a selectively operable branching means, selection of branching for a given map entry causing display of a new help map including the given entry as the higher order entry, where the given entry was originally one of the lower order entries in the map, and as one of a group of lower order entries, where the given entry was originally the higher order entry in the map.
 5. A system according to claim 4 in which the selection means is associated with the indicator means so that the displayed item indicated by the visible indicator is selectable by operation of the selection means and the displayed map entries include icons indicating the permitted direction of branching, if any, the branching operation being selected by operation of said selection means when said visible indicator is position on one of said icons.
 6. A data processing system having a workstation, comprising:a displaying for displaying on a screen panels of information relating to one or more tasks, the panels being viewable through window under the control of a display manager, and operator input means by which an operator can communicate with the system interactively, the input means including: indicator means for identifying items on the screen by means of a visible on-screen indicator. selection means for communicating a selection to the system on the basis of displayed information, said selection means being associated with the indicator means so that the displayed item indicated by the visible indicator is selected by operation of the selection means, and help request means for requesting help information from the system, the system further including: an addressable store of hierarchical help text information wherein a unit of help text can include selectable branch words within the body of the text which are associated with related units of help text, the system including help text branching means responsive to selection of a selectable word in a help text window by the indicator means and the selection means to access the related unit of the help text in the help text store and to cause the display manager to replace the original help text in the help text window with said related unit of help text, contextual help means responsive to an appropriate request for help and to the current state of the system when help was requested to access the help text store to obtain appropriate help text and to cause the display manager to display said help text through a help text window on said screen, concurrently with the information related to the task or task in hand which was being displayed when help was requested, help map display means responsive to selection by said selection means to cause the display manager to display in a separate window, concurrently with said help text window and said information related to the task or tasks in hand, at least a portion of a hierarchical map of the stored help text, each entry of which corresponds to a unit of stored help text, means responsive to selection of a map entry by said selection means to cause help text corresponding to the selected map entry to replace that in the help text window, and a glossary store wherein selection of a help text word other than a selectable branch word causes the display of a glossary window containing a definition of the selected word or a list of the alphabetically nearest words. 